ATE45653T1 - Schaltung zur unterdrueckung des larsen-effekts in der falschanrufzone fuer einen fernsprechteilnehmerapparat. - Google Patents

Schaltung zur unterdrueckung des larsen-effekts in der falschanrufzone fuer einen fernsprechteilnehmerapparat.

Info

Publication number
ATE45653T1
ATE45653T1 AT86400741T AT86400741T ATE45653T1 AT E45653 T1 ATE45653 T1 AT E45653T1 AT 86400741 T AT86400741 T AT 86400741T AT 86400741 T AT86400741 T AT 86400741T AT E45653 T1 ATE45653 T1 AT E45653T1
Authority
AT
Austria
Prior art keywords
signal
circuit
telephone set
larsen effect
suppressing
Prior art date
Application number
AT86400741T
Other languages
English (en)
Inventor
Emmanuel Dabin
Original Assignee
Thomson Csf
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson Csf filed Critical Thomson Csf
Application granted granted Critical
Publication of ATE45653T1 publication Critical patent/ATE45653T1/de

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephone Function (AREA)
AT86400741T 1985-04-12 1986-04-07 Schaltung zur unterdrueckung des larsen-effekts in der falschanrufzone fuer einen fernsprechteilnehmerapparat. ATE45653T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8505564A FR2580449B1 (fr) 1985-04-12 1985-04-12 Circuit de suppression du larsen dans la zone de faux appel pour un poste telephonique d'abonne
EP86400741A EP0199627B1 (de) 1985-04-12 1986-04-07 Schaltung zur Unterdrückung des Larsen-Effekts in der Falschanrufzone für einen Fernsprechteilnehmerapparat

Publications (1)

Publication Number Publication Date
ATE45653T1 true ATE45653T1 (de) 1989-09-15

Family

ID=9318194

Family Applications (1)

Application Number Title Priority Date Filing Date
AT86400741T ATE45653T1 (de) 1985-04-12 1986-04-07 Schaltung zur unterdrueckung des larsen-effekts in der falschanrufzone fuer einen fernsprechteilnehmerapparat.

Country Status (4)

Country Link
EP (1) EP0199627B1 (de)
AT (1) ATE45653T1 (de)
DE (1) DE3665120D1 (de)
FR (1) FR2580449B1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE759917A (fr) * 1969-12-08 1971-05-17 Western Electric Co Reseau a frequence acoustique
DE2739778A1 (de) * 1976-09-07 1978-03-16 Int Standard Electric Corp Digitale fernmeldevermittlungsanlage und teilnehmerstation dazu
US4453037A (en) * 1981-12-28 1984-06-05 Mostek Corporation Loop length compensation circuit
FR2538648A1 (fr) * 1982-12-28 1984-06-29 Thomson Csf Circuit de suppression de signal de microphone pour poste telephonique

Also Published As

Publication number Publication date
DE3665120D1 (en) 1989-09-21
FR2580449A1 (fr) 1986-10-17
FR2580449B1 (fr) 1987-05-22
EP0199627A1 (de) 1986-10-29
EP0199627B1 (de) 1989-08-16

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Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties